HP 450c HP DesignJet 430/450C/488CA Printer - UserÂ’s Guide - Page 105

INTERNAL 5 PRINTS Special internal prints Using the Print Quality Test Print Printing the Print Quality Test Print 1 Before printing, set the Media Type and Print Quality on the front panel to the settings that you want to test. The size of the Print Quality Test Print is B/A3 or A4 so you must use media (roll or sheet) that is this size or larger. Use the same type of media that you were using when the print quality problem was discovered. 2 Load a sheet of media in portrait orientation. 3 When the Ready light comes on, press the Form Feed and Media Source keys together. The Ready light begins to flash. After a while the printer prints the Print Quality Test Print. 4 Study each of the test patterns in the order listed to determine the type of print quality problem. 5 If you encounter problems of print quality using non-HP media and after the Print Quality Test Print the same quality problems appear, you should try using genuine HP media. Repeat the Print Quality Test Print using HP Media. Test 1 (Warm-up) This pattern warms up the cartridges, leaving them in what should be a perfect operating condition; you can ignore this pattern. Test 2 (Nozzles) This tests all 96 nozzles of each cartridge of the printer. For each color there are 96 diagonally stepped lines, with every fifth or seventh identified by number. There are two possible errors shown by this test (see the following diagram): Nozzles not printing or weak. If the diagonally stepped lines are broken in one or more steps, it indicates that these specific nozzles may be blocked and are not printing. Nozzles misdirected. If the diagonally stepped lines are not equally positioned in every step, it indicates that this specific nozzles may be misdirected. To correct these errors, try running the procedure described in the section "Solving print-quality problems" on page 9-12. 5-13